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问题 单项选择题

有6位客人F、G、J、L、M和N，分别安排在(A—6)号七个房间入住，安排要遵守以下的规则： (A)保证每个客人自己住一个房间 (B)三名客人要求住在A-3号，另三位要求住在C-6号。 (3)G一定要住在房号小于C的房间 (C)M和N两位客人之间要隔一个房间 (5)F客人要么住在l号，要么住在3号

如果M和N的房间号不相邻，以下哪项列出了可以安排在M和N之间的所有客人()

A．G、J

B．J、L

C．F、G、J

D．F、G、J、L

答案

参考答案：D

解析：此题用代入法，先将中间安排最多的人代入看是否违反题干规定，便可解题．

填空题

Today, we’ll talk about what other effects watching TV might produce on children. Children should be (1) a lot of television, many experts and parents agree, but there is at least one circumstance when it might be beneficial: (2) . A recent study conducted by Italian researchers found that children (3) immediately preceding and during blood tests experienced less pain than children whose mothers (4) during the procedure, or children whose mothers were present but (5) .
The research, led by Carlo Brown, MD, at the University of Siena, is published in the Archives of Disease in Childhood. (6) the study. None received any type of anesthesia; the children and their mothers (7) . Both the group whose mothers attempted to distract them from the blood tests and those whose mothers simply observed reported (8) than the group who watched cartoons. For that group, the levels of pain were less and the children were better able to (9) .
One of the possible explanations is that children might have (10) during the procedures, exacerbating their perception of pain. "The higher pain level reported by children during (11) shows the difficulty mothers have in interacting positively (12) in their children’s life," the authors write.
However, they stressed that (13) still provided benefits, noting that the children would (14) during the procedures. "Indeed, children state that having their parent present (15) when in pain," say the authors.
Another possibility offered for consideration is the notion that the (16) might release pain-quelling endorphins. Endorphins, (17) produced by the pituitary gland, resemble opiates in their ability to produce analgesia and a sense of well-being. In other words, they might (18) .
In any case, the study results suggest that health workers should (19) to watch television during painful procedures (20) .
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单项选择题

某轮船速12kn，顶风顺流航行，流速2kn，风使船减速1kn，则1h后船舶对水航程为（）。

A．11nmile

B．12nmile

C．13nmile

D．14nmile
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